The selection of earphones is huge and the products are often interchangeable.

耳机的购买选择面非常广，同时耳机还是个可以随意替换的产品。

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So for example, strings naming id attributes are often interchangeable with nodes themselves.

比如，命名id属性的字符串通常与节点本身能够互换。

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These adjectives mean right or correct in view of existing circumstances. They are often interchangeable.

考虑到存在环境时，这些形容词都意为“恰当的或正确的”且通常可以互换。

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When it comes to money particularly American money allies and enemies often seem interchangeable.

NEWYORKER: The Afghan Bank Heist

In the entertainment business, which often views writers as interchangeable, Mr. Grahame-Smith has branded himself as a one-man factory for quirky, high-concept, multimedia franchises.

WSJ: Seth Grahame-Smith: The Master of the Mash-Up

They are often the most unpredictable and most interchangeable pitchers on the roster.

WSJ: 1,000: The Number That